Proceedings of the 78th Annual Meeting of the Japanese Society for Animal Psychology

作者：Yuri Kawaguchi, Fumihiro Kano, Masaki Tomonaga, Yutaro Sato, Satoshi Hirata, Yu Kaigaishi, Masayuki Nakamichi, Kazunori Yamada, Saho Takagi, Atsuko Saito · 发表于：Japanese Journal of Animal Psychology · 年份：2018 · DOI：10.2502/janip.68.2.5 · 研究领域：Olfactory and Sensory Function Studies

In primates, infants are the special members in a society because they require extensive caretaking from adults. Infants have species general (e.g. baby schema) or species specific (e.g. infantile coloration) physical features which adults do not have. In human, it is known that there is attentional and emotional bias for infants, while quite a few studies examined how adults perceive infants in non-human primates. This study examined viewing patterns for adult and infant individuals in chimpanzees and bonobos using an eye-tracker. Fifteen chimpanzees and 6 bonobos participated in this study. We presented to them the pictures of mother-infant dyad of these species (both chimpanzees and bonobos) and an outgroup species (Japanese macaques). The total viewing time for adult and infant faces was analyzed. Chimpanzee showed significant infant looking bias to conspecifics. However, they showed marginally significant infant looking bias to the macaques, and no looking bias to bonobos. The results suggest the existence of infant looking bias in chimpanzees and that this bias may be mainly for own species. Conversely, bonobos showed significant adult looking bias to chimpanzees and macaques but not to conspecifics. Chimpanzees and bonobos have speciestypical interest to infants of own species.